If I can make a complete game right now..

It would be a Third person shooter with covering system like Uncharted 2, with an awesome graphic with dark mood like Killzone 2, have tons of multiplayer feature like Modern Warfare 2, a deep story with proper amount of cinematic like Metal Gear Solid 4, a great Sound and Music quality like Resistance 2, a breakthrough story like Modern Warfare, and sell well like Super Mario Bros ;)